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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is

Same
More
Less
Could be more or less depending on other factors

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Steam Boilers, Engines, Nozzles and Turbines
In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

282 kW
260 kW
302 kW
296 kW

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Steam Boilers, Engines, Nozzles and Turbines
In an impulse turbine, steam expands

Wholly in blades
Partly in the nozzle and partly in blades
Wholly in nozzle
None of these

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Steam Boilers, Engines, Nozzles and Turbines
An air preheater is installed

None of these
Before the superheater
Between the economiser and chimney
Before the economiser

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Steam Boilers, Engines, Nozzles and Turbines
Over fire burning is the phenomenon of

Burning CO and unburnt in upper zone of furnace by supplying more air
Supply of excess coal
Supply of excess, air
Fuel bed firing

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Steam Boilers, Engines, Nozzles and Turbines
The effect of super-saturation is that the

Entropy and specific volume of the steam increases
Mass of the steam discharged increases
All of these
Exit velocity of steam reduces

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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